Shelves of Life - a bookshelf that reassembles to become a coffin 

@erinbee though if I’m personally in need it’s not really my problem lol

Shelves of Life - a bookshelf that reassembles to become a coffin 

@erinbee well then...

Selfie, swimsuit 

@erinbee you always have the coolest glasses.

@popolon @onidaito It depends on if you're using a colour camera or a monochrome one. Colour cameras can fake a luminance channel as there are 2 green pixels for every 1 red and 1 blue pixels. A monochrome camera can do a true luminance shot as there will be no filtering of the incident light.

@benno A series of images taken through red, green, and blue filters with an imager attached to a 20cm f3.9 Newtonian telescope.

The craters on the Moon give testament to the violence of the early solar system. The Earth would also have been bombarded just as bad as the Moon, but our geologically active surface has erased most of that evidence.

The arms of spiral galaxies are thought to be density waves where matter bunches up as it orbits the core. This bunching up sets off star formation in the gas and dust forming hot blue stars which we see as the spiral arms.

Since the hot blue stars are massive and short-lived, they tend to die off shortly after leaving the visible arms leaving cooler less luminous stars to fill the gaps between the arms.

FINISHED! (Aside from washing and ironing, and choosing a frame so I can decide how to sign it.) The pattern is Mars by StitchingLand, it's about 20 cm across, and 10437 stitches. The photo doesn't capture how pleasing the texture really is, so many stitches so close together is deeply satisfying.

#crossstitch

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Map of the Cosmic Microwave Background radiation by the Planck satellite. Though the image may make the CMB variation look large, between the hottest and coldest parts of this image are on the order of 600 microkelvin. Those very slight variations caused the galaxies to form.

2020, possible death, possible fraud, racism, sexism, drama, science twitter, COVID 

@Canageek wow. Didn’t see this at all though I generally only hang out in astrophysics Twitter.

‪iPhone astrophotos: Jupiter, Saturn, Albireo through the 12.7cm Mak-Cas, the Moon through the 80mm refractor. ‬

‪Telescope mount reinstalled on my backyard pier. If the weather cooperates I’ll polar align it tonight. ‬

@tandaylor The Schwarzschild radius of a black hole (essentially where the event horizon is) is mass dependent. So more massive black holes have larger radii than less massive ones. The event horizon can even bulge out a bit if the black hole is spinning.

‪And virtual observatory tour for class complete. Bed time!

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